Drilling-machine.



Patented May I, I900.

H. A. PORTER. 'DRILLING MACHINE.

(Applicatiun filed Dec. 22, 189B.)

4 Sheath-Shoat I.

(No Model.)

I g4??? E Wiigesszs lg egfor l y @flflrargeys,

N0. 648,43l. 7 Patented May I, I900. H. A. PORTER DRILLING MACHINE. (Applicatio n filed Dec. 22, 1898.)

4 Sheets-Sheet 2.

(No Model.)

Wih zssas m: uoams PEI-ms (10., PHOTO-LITNQ. WIGHINGTON, o. c.

Patented May I, I900. 1

II. A. PORTER. DRILLING MACHINE. (Applicaltion filed Dec. 22, 1898.)

4 Sheets-Sheet 3 v (No Model.)

I I. .III.

lay @j hfon z ys,

'ruz uonn|s Pmn: 00.. Punro-u'mol. WASHINGTON. n. r.

N0. 648,43I. Patented May I, I900.

H. A. roman. DRILLING MACHINE.

(Application filed Dec. 22, 15mm (No Model.) 4 Sheets-$haet 4.

I @fis if? ways,

THE mam wzrziu co momma, wunmm-m, o. c.

To all whom zit/ may concern:

. UNITED STATES 'FATENT OFFICE.

IlORATIO-A. PORTER, or HOLYOKE, MASSACHUSETTS.

DRILLING?- MACHINE.

SPECIFlCATION forming part of Letters Patent No. 648,431, dated May 1 1900. Application filed lJeoember 22,1898. Serial No. '70ll,087. (No model.)

Be it known that I, HORATIO A. PoRr R, a. citizen of the United States, residing at 1101- yoke, in the county of Hampden and State of Massachusetts, have invented a new and use} ful Drilling-Machine, of whichithe' following is a specification; I

My invention relates to improvements in drilling-machines; and the primary object is to provide a machine which may beadjusted to variable positions over the bed to suit the drill-bit to the position'of the work thereon.

A further object is to provide means by which the drill-spin-dle may be adjusted horizontally to different positions with relation to the driving mechanism and by which said spindle may be driven in either of its ad'- j usted positions without disturbing the connections with the driving-shaft.

A further object is .toprovide means by which the drill-spindlemaybeadjusted at different angular positions and'in vertical- I planes to the bed and to theshaft which drives said spindle, so that the'drill may operate in various radial positions and at difierent angles on the work. I

A further object is toprO'Vide means by which the drill-spindle may be moved end wise in the drill-head without reference to the positionv of the latter to enable the drillbit to be moved towardthe work or to be retracted therefrom, and with this drill-spindle chine constructed in accordance with my invention. Fig. 2 is a side elevation thereof with the central bed and'work-ta'blein section, the plane of section being indicated by the dotted line 2 2 of Fig. 1. Fig. 3 is a verable carrying means for the drill-spindle.

Fig. 4 is an enlarged vertical section through.

bracket used in the machine represented by Figs. 1 and 2. Fig. .9 is a plan view of am other embodiment of the inventionin which the driving mechanism for the vertical shaft is arranged above the horizontal plane of the table or bed of the machine, the type of drilling-machine mounted by this figure being well adapted to operate upon any kind of work placed on the machine-body Fig. 10 is a vertical sectional elevation through the machine represented by Fig. 9. Fig. 11 is a vertical sectional elevation of a modified construction of the column, the carrier-head,and the clamp-collar for holding said head in po= sition on the column and the gearing.

, Like numeralsof reference denote like and correspondingfparts in the several figures of the drawings.

. The drilling-machinejillustrated by the ac companying drawings is especially designed for drilling or boring holes in bicycle-frames, and in the preferred embodiment of the invention I construct the bed of the machine with a series of supplemental tables adapted to receive a number of bicycle-frames and mount the drilling mechanism proper in away to insure its adjustment over either of the supplemental tables into proper position to the work thereon, said drilling mechanism being adapted for use in connection with the work on either table. As represented by Figs. 1, 2, and 3 of the drawings, the machine is equipped with a stationary bed 1, a series of four supplemental tables 2, and a series of head-blocks ticalsectional elevation through the adjust Fig.6is,

3, said supplemental tablesbeing arranged IOO : 'ployment of horizontally-pivoted and invertible tables for use in connection .vviththe central machine-bed 1,because the tables may be t infix'ed relation to the bed, so as to form' rigid :1 extensions thereof on its several sides. The detail'ed construotion of the supplemental tables,ithe head-blocks therefor, audcthepive' votal connections between the work-tables,the

" *-,Onfl'eahwork table is applied f-elamps 4,Q 6, and 8, which are placed;or.v

- throngh aj'hole-in .the machinee'bed positioned ,Qnlthe table to vreceive Qr e ga 5 w, h v t r v-ar an seesaw th m d: ands a -po t; ee

oyole frat e-substan'tial lyesrep di'b th I o oi g'e r, ended;

E1" m ma nin sipwMa y i ea p dfi ,dri lling'or boring holesinfbioyoles-fra'ines, ift

desi'rableto avoidthe use of an angular'or r y 'o base uppor fo het'ub la colurn'n 11,andIprefer-to'make thefooluinn v as of cylindrical form andto attach the same rigidlyto thef bed 1 by bolts 12, whi'ch'jpas's 7 through a flange, or foot at, the lower extirern- 'ity'of the-oolu nin proper. Passing vertioally *thi'ough this tubular column is a vertical'tnbular stand ardlb, which is fitted loosely in saidQcolhrnn fora movement of rotation'th'ere-- in, and the lower end of this tubular adjust v v through the tubular standard 13, sothat the able standardiprotrudes[below the extended by Which the collar is rigidly clamped on the standard ina position. to bear or ride against the protrndinglower extremity of thelcoln mu.

l r t a ek q llibehereinafterjfnlly'described: l

I I k r the tubnlanstandardg, l3,pf h isi r oft iw rkfsv 'chr f r ex nh ex se bic l r Fi l st dbyd d 1 esjinFig."lofthedrawing York lendlof the l r-cohiinnp drijven by a horiz ntal driving Acarri er-head 16 is loosely sleeved on the vertical tubular standard 13 and arranged to rest upon the upper extremity of the vertical fixed column 11,:andsaid carrier-head is prothus clamp the 'carrierheadrigidly to the standard, wherebyth'e carrier head rides loosely-against the fixed column-11 and is adapted to turn with thetnbular standard 13 intheadj ust'm ent'of rotation of said'standard;

"A' set screw or boltl8is noun ted ina suitably-threaded;socket orop'ening int-he vertical fixed ooln inn l l tolbind or impinge against hol ing the latter n-pl the ve l W i a jx th c men-head '16; and below th'e'flbear n g -head 19, and this collar 24g isprovided .with ajset 'sorew or 10016525, which is adapted to bear 3 against the tubular standard to clampjsaidlcollarrigidly to the standardg This collarrests upon thecarrier-head 1 6 to support the standard lofos'ely'in'v position within the tubular'oolumn,

and it will be observed "that said standard is are rigidly clamped thereto and-adapted to rier-head to hold 'said standard .13 against endwise displacement in a vertical direction within-the colnmnll. I I The shaft 26 passes vertically and loosely upper'extremityof the shaft extends above the b'earing-head 19,;ivhile its lower extremity protrudes through the .lowerend [Of the vertical standard. This verticalshaft is haft27, ar-

provided withtwo collars. l4 and 24,-"which v ranged at right angles to said'vertical shaft and situated below the bed 1. Said drivingshaft 27 is journaled in bearings 28 of the hangers or boxes 29, which are rigidly secured to the under side of said bed, and on said shaft, between the hangers, are fitted the fast and loose pulleys 30 and 31. Themain shaft, by which the-machine is operated, lies below or above the floor of the room or apartment in which the machineis erected, and said main shaft is journaled in boxes of the hangers 33 and is provided with a driving-pulley 34 in the vertical plane of the fast and loose pulleys on the short driving-shaft 27. Abelt 35 passes below or above'the pulley 34 on the main shaft 32 and over one or the other of the pulleys 30 31 of the shaft27, and this belt is adapted to be shiftedby any suitable mechanical contrivance from the fast pulley to the loose pulley, or vice versa,according as it. is desired to throw thedrill-spindle into and out of service. The horizontal driving shaft 27 is operatively connected With'the lower extremity of the vertical shaft 26 by the intermeshing bevel-gears 36 and 37, the

respectively. j

4O designates the 'horizontallyeadjustable shaft, which is journaled in the bearing-head 19, carried byjthe axially-turning vertical standard 13, whereby said shaft is adapted to beadjusted over the bed 1 when said stand-.

ard 13 is turned in the vertical fixed'column This shaft is supported directly by the bearing 22 on one of the arms of the bearing head, and it is indirectly'supported' by the other arm of said bearing-head owing to the interposition between said shaft and the bearing 23 ofthe short tubular shaft44 of the bevel'edgear 43, whichbeveled' gear 43 is fitted.

on the horizontal shaft 40 and is arranged to mesh with a beveled gear 42, which is rigidly fixed in a suitableway to the upper extremity of the vertical shaft 26, which {protrudes above the central part of the bearinghead 19 between the arms or branches thereof. It will thus be seen that the beveled gear 43 has its short tubular shaft 44jo'urnaled in the bearing 23 of one arm or branch of 'the bearing-head 19 and thatthis'short shaft 44 of the said bevel-gear is fitted loosely on the horizontal shaft 40.

Said shaft 40 is designed for endwise or sliding adjustment through the tubular shaft 44 of the bevel-gear 43 and the bearing 22 of the head 19 for the purpose of adjusting the drill-spindle at different distances from the vertical column and standard of the machine; but said shaft 40 is operatively conneotedwith the bevel-gear 43 under all endwise adjustments of said shaft,

I because the shaft 40 is provided with a longitudinal keyway 41 to receive the key or spline t3 of the bevel-gear 43, whereby the shaft 40 may be adjusted to the required position without disconnecting the bevel-gear 43-from the shaft 40, and thus the vertical shaft 26 is adapted through the intermeshing gears 42 43 to rotate the endwise-adjustable horizontal shaft 40. The endwise adjustment of said shaft 40 is, however, limited by the stop-collars 45 46, which are suitably clamped on the shaft at points on opposite sides of the branched bearing-head 19, and in one adjustment of the shaft one collar is adapted to impinge against the arm 20, while the other collar impinges against the other arm 21 when the shaft is moved in the reverse direction, said collars serving also to prevent accidental detachment of the shaf from the bearing-head 19..

Ahorizontal frame 48 is arranged below the shaft 40 and is slidably fitted in. the carrierhead 16, and this frame is operativelyconnected bya face-plate 47 with the shaft 40, so that the shaft 40 andthe frame 48 are adjustable simultaneously in, horizontal planes on the bearing-head 19 and the carrier-head 16, respectively. The horizontal frame is shown as composed of two arms-or, bars of any suitableor appropriate form in cross-,seci 1 tion, and said. frame has its bars or rods slidably fitted in slots or openings 51'of the earrier-head 16, thus permitting the frame to be moved freely in the carrier-head. The bars or rods forming the horizontal frame 48 may be suitably connected together, as by a crossbar, at the end opposite to the face-plate 47 The face-plate 47 is arranged in a vertical position at one end of the horizontal frame 48, and said face-plate is provided with a hub 49 and with lugs 50. The hub 49 is sleeved or fitted on the horizon talshaft 40, while the ln g or lugs 50 are attached rigidlyto the bars or rods of the horizontal frame 48 bysuitable bolts. In the.carrier-head 16 is mounted a ICO clamping screw or bolt 52,which is adapted ,to bind against one of the bars or rods of the horizontal frame 48 to hold the latter in fixed :relation to the carrier-head, and as the horizontal shaft 40 is coupled by the face-plate 47 with said frame 48;said shaft is caused to assume a relatively-fixed position to the standard 13 when the frame 48 is heldby the setsc-rew 52.

The face-plate 47 serves the important purpose of holding the drill head and spindle at any desired angular position to the horizontal shaft 40, and said faceplate is of disk form to enable a clamping-screw on the drill-head head is forked or" bifurcated to en able? its branches 'to be provided with alined bearings which receive'a'drill-spindle,57,capable of free rotation in said'alined bearin gs 58 of the drillhead and also of an endwise or. sliding ad j 'ustment in said bearings. On one of"the"bear-- bevel-gear: 60; which is provided with'a key 7 I or spline 6-1;that fits in a longitudin'al groove 1 't e-01%keywayprovided in'thedrillfspindlev57 of peratively connect-the bevel-' ear 60. t rill-spindle-lin all positions h I stment,{ -a nd mict ns haf getherfor the "s I the 'lowerjed'ge' of ytheb'earing -Jnut mayb v v 1 arranged toholdthezbearing'eballs against assumes an angularposition relatively to the nut; so that some of the bearing-balls donot ride threon;-' The single large bearing-ball- 5'5 70 is confined in place on the upper end of. the drill-spindle by fitting said ball in a flared.

socket on said spindle, so thatthe upper faoe-fl or side'of the ball will play loosely ina flanged part 7 f the cap 71 onthe lever 65, It will thus be observed that the lever has'ball-bear- "ing connection'at two points with the spindle, one of which ball-bearings is formed between ,the extremity .of the spindle" and the cap 1'65 ball-bearing is provided between thefixed a his i adjust the spindle endwise icy raising or de} contain the loose ball-bearings the spindle is v o'onnection with the lever, thus reducing the ings of the" branched dri'il headis fitted a.

, mu.m.".'z- -'lhe shiftablefweight 68 'isv fitted on" 'the, curvedarm '65 of the lever to ride freely :t'ofb'etteryad'vantage't :Itpro'vide said weight .with theball-beari'ng67, adapted to travel on jtlie curvedi -a'rm ofthe lever; Theends of the f. he lev r sfieiversuitablesizes' ofjdri1l bits-75, a p I v '-*:I u some'- typesof'drilling rnachinesit is not I e rab eqr h 'c ssar 't rro dethei for .supporting the -d rill-spindle at variable rovided with a.ball-retainer-plate ,ported'on theframe 48t0 occupy-normally a flclarnpingthe drill-head at difierent" angular 'for the outer extremity of the shaft 40. The

which is secured-to the lever; and the other 77 rises a standard 8O, which extendsabove bearing-nut GS- and thevlev'er 63. The de-f pressing the free end of said lever, and as the connections between the lever and spindle 7o adapted to rotate with great freedom on its friction on thelever connections to a 1niniback and-forth thereon, andto attain this end arranged.with relationjto the pivot or fulcrum 'het s id-W i hb iiaytra f ulcru |n-,";'wliereb the gravity of the i diion theiilever'jto hold a r I W i d P 'Q S 'P ti n' fv'A i hQWubyh dra lissst e t "sad-implied to travel on the lever 'atbne side a on s10: th tith l'w i ang'ular'positions to the'YshaftAO, and'in Fig. 15

of, the'drawings Ifhave, represented one means by which the drill-spindle may be supvertic al position thereon an'dat right angles to saidshaft40. I In this construction I dis- 12o pense with the face-plate and-the means for positions. and in lieu of the face-plate I employ a verticalpost 77, which is attached rigidly at its lower end, as at 78, to the' extremity'of the horizontal frame 48, the upper end of said post being provided with a bearing 79 drill-head 53 is united rigidly to ormade a part-70f this post 77, and said drill-head is equipped, withthe vertically-alined bearings to receive thedrill-spindle;- From the post e-shaft filan'd'n which is fulcr-urned the sides of the frame.

adjusting-lever 63. As in the construction heretofore described, the lever is provided at a point to one side of its fulcrum with a ballbearing connection with the drill-spindle, and around the upper part of said drill-spindle is coiled a spring 76, oneend of which is seated on the drill-head and its otherend against the lever. This spring has a tendency to normally lift the lever and spindle, so that it is necessary for the operator to hold the lever in a depressed position in order that the drill may operate on the work; butI may dispense with said spring and use in lieu thereof ashiftable weight, which is adapted to slide on the lever when the latter is adjusted toward and from the lever-fulcrum, and thereby hold the lever and the drill-spindle in their raised or lowered positions, as in the preferred embodiment of the invention hereinbefore described.

When the drilling-machine is equipped with the series of work-tables 2 at the respective sides of the bed 1, I provide a head-block 3 for each work-table. This head-block is parallel to the edge of the bed 1, and it is maintained in a fixed position by the vertical standards 82, which are stepped at their lower ends in the step-bearings 88, thus supporting the head-block in fixed parallel relation to one edge of the bed. The table 2 is situated between the bed and the head-block, and it is pivotally connected thereto by the horizontal pivots 84:. These pivots consist of angular slotted plates fixed to the edges of the table and bolts or pins which are secured in slots in the opposing edges of the bed and the headblock. Each table supported by the horizontal pivots is adapted to be inverted by turning the same in a vertical plane, and thus either face of the table may be brought, uppermost and opposite to the drill-spindle. The work-table is provided at a suitable point with two or more transverse apertures 85, through which the bit of the drill-spindle may be thrust when the work-table is inverted to drill the work on the lower side of thetable, and thus the table is adapted to present the work to the drilling mechanism so that the bit may borein opposite The work-table is adapted to be held in position when adjusted by means of the spring-controlled locking-rods 86, which are fitted in suitable keepers on the table and adapted to be projected into sockets in the bed 1 of the head-block 3. The described construction of the table is especially useful when the machine is to be used for drilling bicycle-frames. The work may be confined by the clamps on the table and the drill lowered to operate on one side of the framevto drill a hole therein. The lockingrods may then be retracted, the drilling mechanism swungto one side of the table, the table then inverted to turn the work to the under side thereof and to present the other face of the table to view, the locking-rods again engaged with the bed and head-block, and the drill again brought into position to be lowered through one or the other of the apertures 85, so as to contact with the work on the under side of the table, thereby adapting the machine to drill holes in opposite sides of a bicycle-frame. My construction of the machine with a plurality of work-tables each independently adj ustable while the work is contained, thereon enables a series of bicycleframes to be applied to the machine, and the construction of the drill mechanism adapted to be turned on a vertical axis provides for bringing the drill-bit into proper position to the work on either of the work-tables, because the drill mechanism may be swung around over each work-table successively. As the drill-spindle is sustained by horizontally-adjustable means, the spindle may be moved back and forth in a horizontal plane to present the bit to different parts of the work on each table, and the described adj ust-- ment of the drill mechanism provides practically for universal adjustment of the drillspindle, so that it can operate under any and all conditions of service. It will be observed thatthe driving mechanism bywhich the horizontally-adjustable shaft and the drillspindle are driven is contained wholly below the supporting means for said drill-spindle, and thus the drill mechanism is capable of a wide range of adjustment without hindrancefrom or interference with the driving mechanism. I do not desire, however, to strictly confine myself to the location of the driving mechanism below the bed of the machine, because. in some types of machines it may be desirable to place the driving mechanism above the bed of the machine, in which event parts of my improvement may be used, if not the whole.

The machine represented by Figs. 9 and 10 is adapted for drilling purposes generally on any kind of work which may be placed and held on the Work bed or table in a suitable position, or said work may be clamped to the bed in fixed position thereon by any suitable style of clamping devices. The vertical column 11 of the drillingmachine is provided at its lower end with an enlarged boxing or housing 87, which forms an integral part of said column, the said boxing serving to attach the column to the bed or table 88 and to inclose within itself the gearing by which the motion of the power-shaft is communicated to the vertical shaft of the drilling-machine proper. This power-shaft 89 is arranged in a horizontal position above the plane of the bed or table and at one side of the vertical column, exceptthat the inner extremity of said power-shaft passes through a suitable opening in one side of the boxing .or housing for the purpose of having the bevel-gear 90 on said inner end of the powershaft mesh with a bevel-gear 91 of the lower extremity of the vertical shaft which drives the horizontal shaft that in turn actuates the drill-spindle. This horizontal power-shaft is supported above the machine-bed by short relation to the work thereon.

standards 92, which have boxes or .bearings 93 to receive saidpower-shaft, and on the shaft between the standards are fitted the fast and loose pulleys 94 95, respectively. These pulleys extend into a suitable recess in the machine bed or table; but they lie above the horizontal plane'thereof, so that the power- ;shaft may be driven from overhead driving frame 48 and the shaft 40, so that in -the' turning or swinging movement of said frame and shaft on the vertical driving-shaft as a center the belt will not interfere with or be struck by said horizontal frame 48, theshaft 40,.or thedrillspindle. The work is fitted to or clamped upon the machine-bed at any suitable place outside of the vertical column and its boxing or housing, and the drill-frame,

"with the shaft 40, may be adjusted to any req'uired position over the table and in proper The column 11, the driving-shaft, the horizontal frame 48, the horizontal shaft 40, the drill-spindle,

and the means for adjusting and supporting said drill-spindle are constructed substantially as'hereinbefore described, and illustrated by Figs. 2, 3, 4:, 5, and 6 or by Figs. 7 9, and 10, and as the construction and operation of the drilling mechanism proper will .readily be apparent from the foregoing description and the drawings Ido not deem it necessary toagain describe this drilling mechanism in connection with the construction of the machine illustrated by Figs. 9 and 10. I

prefer to make the bars forming the frame 48 of rectangular form in cross-section, as shown by Fig. 4; but this particular shape of the bars is not material, as they may be of circu- -lar or polygonal form in cross-section Without departing from the-spirit of the invention.

'The'machine shown by Figs. 9 and 10 has the drilling mechanism mounted on a single table or bed of suitable dimensions and form,

and I prefer to attach the vertical column to the table near one end or edge thereof and preferably in-the central line of the table, thus exposing a large area of the table for the reception of workwhich may be placed in various positions on the table and held thereon by hand or by suitable mechanical devices. As the drilling mechanism is capable of aswingingadjustment on the vertical column, as well as of a horizontal sliding adj ustmenttoward and from said column", the drill may be conveniently moved to any desired position within the area of the table, whereby the drilling mechanism is well adapted to operate on work placed in various positions on the table or to dilferent parts of work which is clamped to the table in'any suitable relation to the drilling mechanism.

I do not desire to strictly confine myself to the detail construction and arrangement of the parts shown by Figs. 3 and 4 of the drawings, because in Fig. 11 I haverepresented a modified construction of the standard for the application thereto of the carrier-head and the clam ping --collar. By reference to said Fig. 11 it will be observed that the upper part of the column is reduced circumferentially to provide a shoulder 11 and a projecting flange 11 The carrier-head 16 is fitted to the projecting flanged end of the ing-collar 24 is held in place by the set-screw 25, which impinges against thev reduced end 11 of the vertical fixed column, and the standard 13 passes through the column so as to have its guide-head 19 rest upon the upper protruding end 11 of the column. Asin the constructionhereinbeforedescribed,thelower end of the tubular standard 13 receives the clamping-collar 14 to prevent the tubular standard fronrvertical displacement within 'the column.

I am aware that changes in the form and proportion of parts may be made by a skilled mechanic without departing from the spirit or sacrificing the advantages of the invention, and I therefore reserve the right to make such modifications as clearly fall within the scope of the invention.

Having thus described the invention, what I claim is 1. In a drilling-machine, the combination with a bed, of a seriesof adjustable work-tables arranged at the sides of the bed and each supported by horizontal pivots located at the sides of the table for inverting the latter in a vertical plane, and a drilling mechanism erected'on thebed for adjustment over either of said tables, substantially as described. v 2. In a drilling-machine, the combination with a bed, of a series of individually-reversible work-tables arranged radially with respect to the bed, in substantially the same horizontal plane therewith, and each table supported by horizontal pivots located at the sides of the table for inverting the latter in a vertical plane, means for locking each table in its adjusted position, and a drilling mechanism mounted on said bed at a point equidistant from all of thework-tables for presenting the, drill-spindle over either of said tables, substantially as described.)

3. In a drilling-machine, the combination with a bed, of a series of reversible work-ta- IIO drilling mechanism mounted on the bed for adjustment over either of said tables,substantially as described.

4. In a drilling-machine, the combination with a central bed, of a horizontally-adjnstoted, invertible work-tables situated adjacent to the bed, in the path of the drill mechanism, and provided with apertures or slots for the passage of a drill-tool and means for locking said tables in their inverted or adjusted positions, substantially as described.

6. In a drilling-machine, the combination with a bed and an adjustable drilling mechanism, of a series of head-blocks adjacent to the sides of the bed, a series of work-tables pivotally supported on the bed and said headblocks and each provided with a transverse opening and with work-clamps, and locking devices for holding each work-table independent] y of every other work-table, substantially as described.

7. In a drilling-machine, the combination of a fixed hollow column, a hollow standard having a bearing-head projecting above said column, a frame-supporting collar provided with guide-openings in planes on opposite sides of said standard, a spacing-collar intermediate the bearing-head of said standard and the frame-supporting collar, a horizontal frame having connected parallel side bars fitted slidably in and supported by said fixed collar, a vertical shaft passing through said standard, a drill-spindle, and a horizontal shaft mounted partly on the horizontal frame and partly in the bearing-head of the hollow standard, said shaft being geared to the drillspindle and to the vertical shaft, substantially as described.

8. In a drilling-machine, the combination of a stationary hollow column, a hollow stand ard passing therethrough and provided with a bifurcated bearing head which is located above the column, a frame-supporting collar arranged below the bearing-head and provided with parallel guide-openings arranged on opposite sides of the standard, a horizon tal frame having parallel side bars fitted slidably in the openings of the collar, a horizontal shaft supported partly by the frame and arranged above the latter for a part of said shaft to be fitted slidably in the bifurcated head, a vertical shaft, direct gear connections between the horizontal shaft and vertical shaft, and a drill-spindle driven by the horizontal shaft, substantially as described.

9. In a drilling-machine, the combination of a hollow fixed column, a hollow standard provided with a bifurcated head having horizontally-alined shaft-bearings and projecting above the fixed column, a tubular shaft having a beveled gear and journaled in one bearing of said head, a horizontal drill-driving shaft keyed to said tubular shaft in one hear ing of the head and passing slidably through the other bearingof the head, a vertical shaft passing through the hollow standard and terminating below the bearings of the head, a beveled gear fixed to the vertical shaft and meshing directly with the bevel-gear of the tubular shaft,a fram e-supporting collar seated on said fixed column, a horizontal frame fitted slidablyin said collar and supporting the horizontal drill-driving shaft, and a spacing collar interposed between the frame-supporting collar and said bifurcated head, substantially as described.

10. In a drilling-machine, the combination of a hollow fixed column, a frame-carrying collar resting on said column and having parallel guideopenings, a frame with parallel side bars fitted slidably in the collar, a standard having movement of rotation in the column and provided with a surface adapted to rest on'the collar and with a bifurcated bearing-head projecting above the collar, a horizontal shaft supported by said frame and the bearing-head, a vertical shaft extending through the standard, and intermeshing gears fitted directly to the vertical shaft and to the horizontal shaft, respectively, substantially as described.

11. In a drilling-machine, the combination of a vertical colu1nn,a hollow standard mounted to have movement or rotation therein, a carrier-head fitted to said standard and the column, a horizontal frame fitted slidably in said carrier-head, a horizontal shaft supported partly by the horizontal frame and journaled in the carrier-head for slidable movement therein with said horizontal frame, a drill-head mounted on said frame at its free end and adjustable on a horizontal axis independently of any movement of the frame, a

drill-spindle supported by the drill-head and geared to the horizontal shaft, and a vertical shaft passing through said hollow standard geared to said horizontal shaft, substantially as described.

12. In a drilling-machine, the combination of'a fixed vertical column, a tubular standard fitted in said column and having a bearing- IIO head, a vertical shaft passing through said column and provided with a beveled gear, another bevel-gear mounted in one of the bearings of said bearing-head, a horizontal shaft passing through the bearing-head and the last-named bevel-gear and keyed to said bevelgear to permit endwise adjustment of said shaft, a horizontal frame slidably connected with said vertical standard and column and adjustable axially thereon, a drill-head carried by said frame, and a spindle mounted in the drill-head and geared to the horizontal shaft, substantially as described.

13. In adrillix'ig-machinathe combination;

7 of a vertical fixed column, a tubular standard fitted therein and provided with a bearinghead, a carrier-head fitted to said column and f standard, the collars clamped on the standard or column andbearing against the column and thebearing-head, respectively, ah orizontally-adjustable frame fitted jslidably in the carrier-head, an endwise-movable shaft jour-,

naled in the bearing-head, a drill-head car-r ried by saidframe, a spindle mounted in thedrill-head and geared to the horizontal'shaft, and a vertical shaft passing through the stand ard and geared" to the horizontal shaft, sub

stantially as described. I

14:. In a drilling-machine, the combination with a drill-head and a spindle, of' a lever fulcrumed to said head, a cap carried by the le-; ver and having ball-bearing connection with the end of the spindle, and a nut carried by the spindle and riding upon the lever,.substantially as described.

15. In a drilling-machine, the combination:

with ra drill-head and spindle, of a lever 111- crumed'to said'head,a ball-bearin g nut mounted on the spindle and having traveling conextremity of the spindle and is fixed to the lever, and a bearing-ball. seated inthe spindle and said cap, substantially as described.

16. In adrilling-machine, the combination with a drill-head and a spindle, of a lever fulcrumed on the drill-head and having an arm projecting beyond said lever and the spindle, and ashiftable weightfittedon the arm of the lever and provided with ball bearings which have travelingcontact with said lever-arm,

substantially as described. V

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

I-IORATIO A. PORTER.

Witnesses: r

FRED. F. PARTRIDGE, LEROY G. DOANE.

tact with the lever, a cap which straddles the 

